Jedi Monti not doing well all of a sudden

[tmulrney]

I've had this coral for 6-8 months and it has been thriving. Suddenly, though it looks like tissue is receding. I don't see any pests. I do have other monti's which are so far doing well.
Parameters: salinity 1.025, alk 10.8 ph 8.2, ca 460, Mg 1400, PO4 .04, nitrates 0. I have Radion LEDs.
My Ca recently dipped down to 325. I don't know exactly how long it was at that level but previous testing from 2 weeks before was 460. Could this be the cause? Any input is greatly appreciated. This is a special piece to me and I'd hate to loose it.

 

[tmulrney]

Here is a pic

 

[Frick]

If the calcium dropped the alkalinity probably rose up. Unstable fluctuations like this can stress certain Montipora. Especially if it is fast. Personally my M. mollis (purple Haze) will be the first to show this if it happens.

 

[tmulrney]

Thanks. Hope it will come back.

 

[Frick]

It should, just don't go trying "new" stuff in hopes to fix the problem faster.

 

[rogerwilco357]

how long have you had him under the radions ?

 

[tmulrney]

The entire time I've had him.

 

[Dog boy Dave]

If the calcium dropped the alkalinity probably rose up. Unstable fluctuations like this can stress certain Montipora. Especially if it is fast. Personally my M. mollis (purple Haze) will be the first to show this if it happens.

What he said, High Ca will affect your millis and montis first and worst. Yes the coral will recover if you stabilize your water.

 

[tmulrney]

Doing a scheduled water change today. Thanks for input. Ca and Alk have been stable for a week. Let's see.